commencement of the march, and before he had advanced fifty miles from Tehuantepec he had not more then seventy men. The revolt is headed by Meldono, one of the wealthiest and most influential men in the State. A good deal of excitement has been produced in Mexico by the publication of the letters of Payno, to the President of the Committee of Mexican bond-holders in London. It seems that the assertion of Payno that he was Chargé d'Affaires of the Mexican Legation in London, and was commissioned to adjust certain matters pending in Europe, was entirely destitute of foundation. On the publication of the letter containing these statements, and others equally untrue, a resolution was introduced into the Chamber of Deputies, inquiring by what authority Payno had received the appointment of chargé, and how much money was appropriated to his mission. The Minister replied that Payno had never received the commission from the Government, but that $20,000 had been applied to defraying the expense of the voyage. In consequence of this information, a complaint was lodged against the former Minister of Finance, and of Foreign Relations. The affair was also taken up by the Senate, which has recommended Lacunza as Minister to England. From _Montevideo_ we have intelligence to the first of July. The aspect of affairs in Brazil and Buenos Ayres was by no means pacific. The Brazilian force under Admiral Grenfell, the Commander-in-chief, had penetrated the waters of the Uraguay, and were stationed at commanding points along the north bank of the river. The disaffection of the province of Entre Rios had been followed by that of Corrientes, warlike preparations were in train; and every thing threatened a general outbreak. The mediation of Great Britain had been accepted by Gen. Rosas. The slave-trade on the coast of Brazil was at a low ebb, a deep laid scheme for its revival having been defeated by the British squadron. Only 1000 slaves were landed during the first six months of 1851, while no less than 20,000 were landed in the same period of 1848. From the island of _Hayti_ our advices are to the middle of August. Every thing was then quiet. The Emperor had returned to Cape Haytien from his tour, having crossed the Dominican frontier without being molested, and it was reported that the difficulties between the Dominican and Haytian governments have been amicably settled. An eruption of the long dormant volcanoes of the Pellée Mountain, in Martinique, took place on the night of August 5. It was accompanied with a noise similar to the approach of thunder, and with a strong vibration that was felt to a considerable distance. The town of St. Pierre, as well as all the surrounding country, was covered over with gray ashes. The population of Prêcheur were obliged to flee from their homes, and to take refuge in St. Pierre. There was no shock of an earthquake. GREAT BRITAIN.